Air pump



E. WENGER AND C. E. RODIN.

AIR PUMP.

APPLICATION FILED MAR. 25, um.

Patented Nov. 7, 1922.

LQSQAIE.

m INVENTUHE ATTELRNEY Patented Nov. 5, 1922 stern EDGA VI'ENGER AN DCHARLES E. ROBIN, OF CALGARY, ALEEETA, CANADA.

AIR PUMP.

Application filed March 25, 1921.

'1 0 all whom it may concern:

Be it known that we, EDGAR Nausea and (hilarious l5. ROBIN, citizens ofthe Dominion of Canada, residing at Calgary, in the county of Calgaryand Province of Alberta, Can.- ada, have invented certain new anduseful. improvements in Air Pumps, of which the following is aspecification.

The p resent invention relates to air pumps for the inflating ofpneumatic tires for automobiles and the principal object is to provide adevice of the character described adapted for connection to a cylinderhead of an automobile engine, and may be actuated thereby.

.Il0tl1Gl object is to provide an air pump which will eliminate thepassage of gas and oil from the cylinder head. into the pneumatic tire.

With these and other objects in view, the invention consists inconstruction, combination and arrangement of parts as will behereinafter fully described, illustrated in the accompanying drawing,and pointed out in the claims hereunto appended.

The drawing is a transverse vertical. sec ticn of the improved. airpump.

The air pump illustrated in the drawing is of simple construction andcomprises a cylinder member 1 hereinafter designated as the powercylinder.

Underneath the base of the power cylinder is disposed a downwardlyextended flanged member 2, the interior of said member being threaded toreceive exterior-1y threiuled tubular nipple 3. The lower portion of thenipple is eXteriorly threaded to engage in the threaded aperture a sparkplug opening in. the cylinder head.

Immediately above the power cylinder 1 is disposed a compressioncylinder l, having its lower extremity 5 outwardly flanged, the face ofthe flange being threadedly engaged in the upper extremity 6 of thepower cylin der.

Centrally disposed in the cylinders is piston rod 7 on which pistons Sand 9 are fixedly mounted. Pistons 8 and 9 are provided with pistonrings 10, 11 and 12. On the lower extremity of piston rod 7 is slidablymounted washer 13 which is held thereon by nut 1.4. A seat base of thepower cylinder 1.

At. the conjunction of cylinders 1 and l, a seat 15 is provided to holdwasher 16 in normal position. Immediately above washer 30 provided forwasher 1.3 in the.

Serial No. 55,580.

16 is a leather washer l? which is held rigidly by washer 18. The flange5 holds washers 16,, 17 and 18 in fixed position. l l asher 17 has itscentral portion 19 upwardly disposed and tensioned against piston rod 7by coil s 1 ring 20.

On the upper extremity of cylinder l an outwardly flanged member 21 isformed. Threadedly mounted on flanged member 91 is nipple 22 whichprovided with tubular member 23. The members 21 and nipple have an exitopening therethrough. A. discharge, one-way check valve 2% is centrallydisposed in the opening in member 21, whereby air can be discharged intothe tubular member 23.

At the apex of piston rod 7 is disposed another chect: valve 26 providedwith inlet ports 27. Inlet valve ports and. 29 are provided in cylinderl. Lubricating members 31 and 32 are disposed. beneath intake valveports 28 and 29.

Air relief ports 33 and are provided in the upper extremity of powercylinder 1.

In use, one of the spark plugs is removed and the pump engaged inaperture for the spark plug in the cylinder head.

Upon actuation of the engine, a mixture of air, gas, and oil is forcedthrough tubular nipple 3into power cylinder 1. The force drives piston 8upwardly. Upon this upward moven'ient air is sucked in through theintake valve ports 28 and 29, filling lower portion of cylinder l. Atthe same time, the air in the upper portion of the cylinder el is forcedthrough check valve 24; and the air passes through tubular member 23,thus in dating tire.

Tillie air which may be in the upper portion of power cylinder 11. willescape tl'irough relief ports 33 and Upon the downward stroke of thepistons. the air in the lower portion of cylinder 4; enters ports 27 andpasses through check valve 26 into the upper portion of cylinder 4 abovethe piston 9. (hi this stroke. discharge valve Q l automatically closespreventing return of air from tire. Washer 1.3 enters seat 13 preventingescape of mixture and giving cushioned action to piston rod, preventingviolent vibration.

A safety valve may be provided in any suitable manner (not show torelease at any desired pressure, thus eliminating the danger of overinflating the tire.

The reciprocating motion of piston rod T might have a tendency to allowthe passage of the mixture around washer 18 from cylinder to tire but iscurtailed by tension of coil spring 20.

From the foregoing, it is thought that the construction of our inventionwill be clearly understood, and, therefore, a more extended explanationhas been omitted.

What we claim as new is:

1. Means for utilizing the actuation of an automobile engine for theinflating of pneumatic tires comprising in combination, a powercylinder, a compression cylinder 10- catcd at its upper extremity, areciprocable member centrally disposed in said cylinders, means foractuating said reciprocable member, luliiricating members disposed inthe wall of compression cylinder, means for transporting the com Jressedair for the compressing cylinder to the pneumatic tube, a washer memberslidable on the lower end or" said reciprocable member, and means forfixedly mounting the combination to the cylinder head of an automobileengine.

53. Means for utilizing the actuation of an automobile engine for theinflating of pneumatic tires comprising in combination a power cylinder,a compression cylinder located at its upper extremity, a plunger rodcentrally disposed in said cylinders, a piston fixably mounted near thelower extremity of the plunger rod, a smaller piston fixedly mounted onthe apex of said plunger rod, piston rings adjusted to said pistons, aslidable washer member mounted on the lower portion of the plunger rod,a nut screwthreaded on the end of said plunger rod, and a seat disposedin the base of the power cylinder for the reception of the said slidablewasher.

3. Means for utilizing the actuation of an automobile engine for theinflating of pneumatic tires comprising in combination a power cylinder,a compression cylinder located. at its upper extremity, a plunger rodcentrally disposed in said cylinder, pistons fixedly mounted on saidplunger rod, washer members disposed at the conjunction of thecylinders, washer member disposed be tween said washer members having aflanged member upwardly disposed, means for tensioning said flangedmember against plunger rod, an intake port disposed in the upper portionof the said plunger rod, a check valve centrally disposed above saidintake port, intake ports disposed in the compression cylinder, airoutlet ports disposed in the power cylinder, a discharge check valvedisposed at the extremity of the compression cylinder and adjustablemeans to relea e the compressed air from the compression cylinder.

In testimony -whereof we hereunto aiiix our signatures in the presenceof two witnesses.

1 EDGAR l VENGER.

CHARLES ROBIN. .Vitnesses W. E. STEVENSON, I. W. MoARnLn.

